8652821 has 2 divisors, whose sum is σ = 8652822. Its totient is φ = 8652820.

The previous prime is 8652803. The next prime is 8652823. The reversal of 8652821 is 1282568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8059921 + 592900 = 2839^2 + 770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8652821 is a prime.

It is a super-2 number, since 2×8652821² = 149742622516082, which contains 22 as substring.

Together with 8652823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8652823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4326410 + 4326411.

It is an arithmetic number, because the mean of its divisors is an integer number (4326411).

Almost surely, 2^8652821 is an apocalyptic number.

It is an amenable number.

8652821 is a deficient number, since it is larger than the sum of its proper divisors (1).

8652821 is an equidigital number, since it uses as much as digits as its factorization.

8652821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 32.

The square root of 8652821 is about 2941.5677792633. The cubic root of 8652821 is about 205.2985615934.

The spelling of 8652821 in words is "eight million, six hundred fifty-two thousand, eight hundred twenty-one".